Scott Lurndal wrote:


This statement shows astounding ignorance about the carbon cycle
and the reasons that CO2 has risen from 230ppm to 400ppm in the
last century and a half. I'll give you a hint - the CO2 you exhale
is not CO2 that has been sequestered for millions of years in
geologic coal or oil formations. Same applies to cow farts.

So long as the system is in equilibrium, i.e. no carbon is being
added to the system, the CO2 fraction in the atmosphere won't change,
no matter how many people exhale, since the carbon they're exhaling
was recently (within a year or two) in the atmosphere (taken up by
plants, fed to cows, and eaten as hamburgers, then exhaled).

Have you actually worked out how much 400 parts per million represents?

A penny weighs 2.5 grams. One million pennies weighs 2.5 million grams, or
about two and a quarter TONS. Four hundred pennies comes in at about two and
a quarter POUNDS.

This ratio is about equivalent to the weight of a coat of paint on a big
diesel engine.

Asserting that a CO2 concentration of 400ppm affects the atmosphere is
exactly equivalent to claiming the coat of paint on a engine affects the
engine's performance.